How to change your cPanel password:
First, you would need to know the server you're on so you can go to cPanel to change your password.(You can click "Login" to cPanel in your billing panel but you need your cPanel username and password).
1) Log into http://billing.arvixe.com/
2) Click "Hosting Accounts" bottom right.
3) Click your Hosting Account and you'll see the server (Image below):
4) You can log in where it says login but you need your cPanel username and password to log into the server.
5) After you log in, look for Preferences and look for "Change Password" (Check the image below):
6) Here is the final step to changing your cPanel password:
7) There you go! You have changed your cPanel password! You now use that new password to log into cPanel.